Recycled secondary battery supply forecast system and recycled secondary battery supply forecast usage

ABSTRACT

A recycled battery supply forecast unit  201  of a battery management server  20  receives, from a plurality of vehicles  40,  performance information of a secondary battery  403  mounted on each of the vehicles  40  and state information of the vehicle for determining a life of the vehicle  40,  makes a forecast of an end of life of the vehicle  40  by using history of the state information of that vehicle, and makes a forecast of performance of the secondary battery  403  at the end of life of that vehicle  40  by using history of the performance information of the secondary battery  403.  In addition, a forecast is made of a supply quantity of recyclable secondary batteries at a certain point in time in the future based on a forecast result of the performance of the secondary battery  203  at the end of life of each vehicle  40.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application claiming priority to U.S.patent application Ser. No.14/007,522, filed on Sep. 25, 2013, whichclaims priority to national stage application of InternationalApplication No. PCT/JP2012/057565, entitled “Recycled Secondary BatterySupply Forecast System and Recycled Secondary Battery Supply ForecastUsage,” filed on Mar. 23, 2012, which claims the benefit of the priorityof Japanese patent application No. 2011-071836, filed on Mar. 29, 2011,the disclosures of each of which are hereby incorporated by reference intheir entirety.

BACKGROUND

The present invention relates to a recycled secondary battery supplyforecast system and recycled secondary battery supply forecast usage forforecasting the quantity level of recyclable secondary batteries thatcan be supplied.

Secondary batteries that are mounted on electrically driven vehicles andthe like use globally limited resources such as nickel, cadmium andcobalt. Thus, from the perspective of environmental protection, thereuse and recycling of secondary batteries are desirable. Aselectrically driven vehicles equipped with secondary batteries, thereare electric cars and hybrid vehicles equipped with both an internalcombustion engine and a motor. In order to drive this kind ofelectrically driven vehicle with electricity, the mounted secondarybatteries need to be charged using an external charger. Generallyspeaking, when a secondary battery is used for a long period, theperformance thereof will degrade due to the repeated charging anddischarging process. This degradation leads to decrease of the totalcapacity and maximum output current of the secondary battery. Moreover,the secondary battery will swell and deform accompanying suchdegradation.

Moreover, since secondary batteries are manufactured using rare metals,the manufacturing cost is extremely high. Thus, when a vehicle reachesits life, if the secondary batteries that were used in that vehicle havenot degraded considerably, the manufacturing cost of another device canbe reduced by reusing such secondary batteries in that other device.Moreover, when a vehicle reaches its life, if the secondary batteriesthat were used in that vehicle have degraded to the extent that theycannot be reused, by disposing such degraded secondary batteries andrecycling the rare metals and the like, and using the recycled materialsfor the manufacture of a new secondary battery, the manufacturing costof the new secondary battery can be reduced.

For a manufacturer of devices that have recycled batteries builttherein, it is extremely important to grasp the quantity level and theperformance level of recyclable secondary batteries that can be suppliedand when such a quantity can be supplied upon devising its batteryprocurement plan and the device manufacturing plan. Moreover, for asecondary battery manufacturer, being able to grasp an amount ofrecycled materials that can be supplied and when such recycled materialscan be supplied is extremely important information upon devising itssecondary battery material procurement plan and the secondary batterymanufacturing plan.

As an example of conventional technology related to the optimization ofreusing secondary batteries, Patent Document 1 describes collectingbattery information, which is unique to a secondary battery, in abattery information management device on a communication network,wherein the battery information management device sorts by the grade thesecondary batteries when they are recycled based on the batteryinformation which is unique to that secondary battery.

Patent Document 1: Patent Publication JP-A-2007-141464

Nevertheless, with the technology disclosed in Patent Document 1, whilethe secondary batteries are sorted by grade when they are recycled,there is a problem in that it is not possible to forecast the quantitylevel and the performance level of recyclable secondary batteries thatcan be supplied and when such a quantity can be supplied.

SUMMARY

Thus, an exemplary object of this invention is to provide a systemcapable of forecasting the quantity level and the performance level ofrecyclable secondary batteries that can be supplied.

The recycled secondary battery supply forecast system according to thepresent invention comprises a vehicle life/battery performance forecastunit which receives, from a plurality of vehicles, performanceinformation of a secondary battery mounted on each of the vehicles andstate information of the vehicle for determining a life of the vehicle,makes a forecast of an end of life of the vehicle by using history ofthe state information of that vehicle, and makes a forecast ofperformance of the secondary battery at the end of life of that vehicleby using history of the performance information of the secondarybattery, and a battery supply quantity forecast unit which makes aforecast of a supply quantity of recyclable secondary batteries at acertain point in time in the future based on a forecast result of theperformance of the secondary battery at the end of life of each vehicle.

According to an exemplary aspect of the present invention, it ispossible to forecast the quantity level and the performance level ofrecyclable secondary batteries that can be supplied.

DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram showing the configuration of the recycledsecondary battery supply forecast system according to Embodiment 1 ofthe present invention.

FIG. 2 is a block diagram showing the detailed configuration of thebattery management server according to Embodiment 1 of the presentinvention.

FIG. 3 is a flowchart showing the lifecycle of a secondary battery.

FIG. 4 is a sequence diagram of the processing for making a forecast ofthe supply of recycled batteries according to Embodiment 1 of thepresent invention.

FIG. 5 is a diagram showing an example of history data of the batteryperformance and vehicle state of a specific vehicle according toEmbodiment 1 of the present invention.

FIG. 6 is a graph showing the relation of the battery capacity, thetravel distance and the years of use of a specific vehicle.

FIG. 7 is a diagram showing an example of the forecast result of thevehicle life and battery performance of a plurality of vehiclesaccording to Embodiment 1 of the present invention.

FIG. 8 is a diagram showing an example of a table of the forecast supplyquantity of recycled batteries according to an embodiment of the presentinvention.

EXEMPLARY EMBODIMENT Embodiment 1

An exemplary embodiment for working the present invention is nowexplained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a recycledsecondary battery supply forecast system 10 according to Embodiment 1 ofthe present invention. As shown in the diagram, the recycled secondarybattery supply forecast system 10 comprises a battery management server20, a communication network 30, and a vehicle 40. The battery managementserver 20 and the vehicle 40 are connected via the communication network30.

The battery management server 20 comprises a recycled battery supplyforecast unit 201, a communication unit 202, and a battery database 203.The battery management server 20 may be a dedicated or general computercomprising a CPU, a memory such as a ROM or a RAM, an external storagedevice for storing various types of information, and an input interface,an output interface, a communication interface, and a bus for connectingthe foregoing components. The battery management server 20 may beconfigured from a single computer or configured from a plurality ofcomputers which are mutually connected via a communication line.

The recycled battery supply forecast unit 201 and the communication unit202 correspond to functional modules that are realized by the CPUexecuting predetermined programs stored in the ROM or the like. Thebattery database 203 is loaded from an external storage device.

FIG. 2 is a block diagram showing the detailed configuration of thebattery management server 20. As shown in FIG. 2, the recycled batterysupply forecast unit 201 comprises a vehicle life/battery performanceforecast unit 2011, and a battery supply quantity forecast unit 2012.

As shown in FIG. 1, the vehicle 40 is equipped with a communication unit401, a battery management unit 402, and a secondary battery 403. Thesecondary battery 403 is a lithium ion secondary battery, a nickel metalhydride secondary battery, a lead secondary battery, or a similarsecondary battery. The communication unit 401 is communication meansbased on a mobile phone, wireless LAN, infrared communication or powerline communication on a power line that is connected during charging, orsimilar communication means.

The operation of the recycled secondary battery supply forecast system10 is now explained with reference to FIGS. 3 and 4.

FIG. 3 is a flowchart showing the lifecycle of the secondary battery403. In FIG. 3, a material trading firm procures and sells batterymaterials. A battery manufacturer procures new materials and recycledmaterials as battery materials, and manufactures and sells batteries. Anautomobile manufacturer procures batteries, installs the batteries invehicles, and sells the vehicles.

A recycled battery trading firm classifies whether the batteries ofvehicles that reached its life can be reused and sells recyclablebatteries, and disposes batteries that cannot be reused. A devicemanufacturer of devices with a recycled battery built therein procuresrecycled batteries, installs the recycled batteries in devices, andsells the recycled battery built-in devices. A recycling manufacturerprocures unrecyclable discarded batteries that were removed fromvehicles and recycled battery built-in devices, recycles and sellsmaterials, and disposes waste that cannot be recycled. In a lifecycle ofa secondary battery, a recyclable battery may also be reused in aseparate vehicle. Moreover, a once-used battery may also be reused in aseparate device once again.

Next, in the lifecycle of batteries shown in FIG. 3, how the recycledbattery supply quantity and discarded battery supply quantity forecastedby the recycled secondary battery supply forecast system 10 according tothis embodiment are used by which business operator is now explained.

For a device manufacturing of devices with a recycled battery builttherein, being able to grasp the quantity level and the performancelevel of batteries that can be supplied and when such a quantity can besupplied is important information upon devising its recycled batteryprocurement plan and the device manufacturing plan. Moreover, for arecycling manufacturer, being able to grasp the quantity level ofdiscarded batteries that can be supplied and when such a quantity can besupplied is important information upon devising its discarded batteryprocurement plan and recycling plan. Moreover, for a batterymanufacturer, being able to grasp an amount of recycled materials thatcan be supplied and when such recycled materials can be supplied isextremely important information upon devising its battery materialprocurement plan and the battery manufacturing plan.

FIG. 4 is a sequence diagram of the processing for making a forecast ofthe supply of recycled batteries.

The processing of the battery management unit 402 of the vehicle 40 isnow explained.

Foremost, the battery management unit 402 stands by until reaching thetiming of sending the performance information of the secondary battery403 and the state information of the vehicle 40 to the batterymanagement server 20 (step S101). The data sending timing may be thetiming that a given period such as one day or one week has elapsed.Otherwise, the data sending timing may also be the timing that thevehicle 40 was used and stopped, and the key was removed therefrom, orthe timing that the charging of the secondary battery 403 is completed.Here, as one example, data is sent every other week.

Upon reaching the data sending timing (step S101: YES), the batterymanagement unit 402 measures the performance of the secondary battery403 and measures the state of the vehicle 40 (step S102).

As the performance information of the secondary battery 403, the totalcapacity of the secondary battery 403 and the maximum output current ofthe secondary battery 403 are measured. Generally speaking, when asecondary battery is used for a long period, the performance thereofwill degrade due to the repeated charging and discharging process, andthe total capacity and maximum output current will decrease. Moreover,when a secondary battery is used for a long period, it is known that thesecondary battery will swell. Accordingly, the swelling of the secondarybattery may also be measured using a pressure sensitive sensor installedaround the battery and used as performance information.

Moreover, as information of the vehicle state, the travel distance andthe used hours are measured. For example, it is possible to mount a GPSon the vehicle 40 and use the measured latitude/longitude information asthe vehicle state.

Subsequently, the measured battery performance and vehicle state aresent to the battery management server 20 (step S103).

The processing of the vehicle life/battery performance forecast unit2011 of the battery management server 20 is now explained.

Foremost, the battery performance forecast unit 2011 stands by toreceive information on the battery performance and vehicle state fromthe vehicle 40 (step S111).

Upon receiving the battery performance and vehicle state from thevehicle 40 (step S111: YES), the battery performance forecast unit 2011registers this information in the battery database 203 (step S112).Here, if data received from the vehicle 40 is data that has not beenregistered in the database, a battery ID is given so that the batterycan be identified. In the battery database 203, the battery performanceof a specific vehicle for each battery and the history data of thevehicle state are recorded.

FIG. 5 is a diagram showing an example of history data of the batteryperformance and vehicle state of a specific vehicle. As history data,recorded are a battery type for identifying the type of battery, ahistory number for indicating how many times the data has been received,a data recorded date and time on which the data was received andrecorded, a travel distance, place of use, and, as the batteryperformance, current battery total capacity, current battery maximumoutput current, number of normal charging and number of rapid charging.

Subsequently, the battery performance forecast unit 2011 determineswhether the received battery history data has been recorded for a givenperiod or longer (step S113). Specifically, the battery performanceforecast unit 2011 analyzes the type of changes in the past by using thehistory information recorded during a certain given period of time, andsubsequently makes a forecast of the vehicle life and makes a forecastof the battery performance in the future. In this embodiment, theminimum accumulation period of history information for making a forecastof the vehicle life and the battery performance in the future shall beone year.

Subsequently, the battery performance forecast unit 2011 refers to thepast battery performance of the battery and the history information ofthe vehicle state from the battery database 203 (step S114).Subsequently, the battery performance forecast unit 2011 makes aforecast of the vehicle life based on the history information of thevehicle state (step S115).

The method of making a forecast of the vehicle life is now explainedwith reference to FIG. 6. FIG. 6 is a graph showing the relation of thebattery capacity, the travel distance and the years of use of a specificvehicle. Here, when a vehicle reaches a certain predetermined traveldistance, this is defined as the end of life of that vehicle. Thistravel distance will differ depending on the model of the car.Specifically, for instance, the point in time that the vehicle travelled100,000 kilometers is defined as the end of life of that vehicle.

Based on the history information of the vehicle state of thecorresponding vehicle, points are plotted with the period of use (numberof years) and travel distance as both axes to draw a graph. Byperforming linear approximation to the plotted points, it is possible todraw a line which makes a forecast of the increase in travel distance.The period of use when the travel distance will reach 100,000 kilometersis forecasted as the vehicle life. In the example of FIG. 6, thestraight line of the future increase forecast is drawn from theinformation regarding the travel distance of a two-year period from thestart of use, and the forecast is that the vehicle will reach 100,000kilometers seven years later. Thus, the vehicle life is forecasted to beseven years after the start of use.

Moreover, a polynomial approximate curve such as a quadratic curve or asimilar approximate curve may be used for making a forecast of thefuture value of travel distance. Moreover, as the method of determiningthe vehicle life, a method of making a forecast based on the totalnumber of hours that the vehicle was actually driven may also be used.For example, a vehicle may be determined as having reached its vehiclelife after being driven for 10,000 hours.

Moreover, as another method of determining the vehicle life, the vehiclelife may be determined based on the period of use. For example, when tenyears lapse from the start of use, this may be defined as being thevehicle life. Moreover, means for allowing the user to freely define thetravel distance, used hours, and period of use for determining the lifemay also be provided.

Subsequently, the battery performance forecast unit 2011 makes aforecast of the battery performance at the end of the vehicle life basedon the history information of the battery performance (step S116). Themethod of making a forecast of the battery performance at the end of thevehicle life is now explained with reference to FIG. 6. In thisembodiment, the battery performance is defined based on the degradationratio of the total capacity of the battery. Points are plotted with theperiod of use (number of years) and the battery capacity and a graph isdrawn using the history information of the degradation ratio of thetotal capacity of the battery of the corresponding vehicle. Byperforming linear approximation to the plotted points, it is possible todraw a line as a forecast of the decrease in the degradation ratio ofthe total capacity of the battery. Here, since the life of thecorresponding vehicle was forecasted to be seven years after the startof use, it is possible to forecast that the battery capacity at the endof the vehicle lift (7th year of use) will be 83% from the graph of FIG.6.

Note that a polynomial approximate curve such as a quadratic curve or asimilar approximate curve may be used for making a forecast of thefuture value of battery performance. Moreover, the battery performancemay be defined based on the degradation ratio of the maximum outputelectric energy at the end of the vehicle life by using the historyinformation of the maximum output current of the battery.

Based on the foregoing processing, it is possible to make a forecast ofthe performance of the battery at the end of the vehicle life in aspecific vehicle.

Subsequently, the battery performance forecast unit 2011 uses theforecast results of the vehicle life and the battery performance andupdates the battery database 203 (step S117). An example of a data listof the forecast results of the vehicle life and battery performance of aplurality of vehicles is shown in FIG. 7. This data includes informationof a battery ID for identifying the battery, a battery type foridentifying the battery type, date of start of use of battery, initialcapacity of battery, life travel distance of vehicle defined for eachtype of car, vehicle life forecasted date and time, and forecasteddegradation ratio of total capacity of battery at end of vehicle life.

The processing of the battery supply quantity forecast unit 2012 of thebattery management server 20 is now explained with reference to FIG. 4.

Foremost, the battery supply quantity forecast unit 2012 receives aninquiry regarding the battery supply quantity forecast result from auser (step S121). The user can make an inquiry by designating data ofdesired conditions. For example, the user can designate the period andbattery type such as the forecasted supply quantity of the recyclablebatteries of battery type A during the period from April to September2020.

Subsequently, the battery supply quantity forecast unit 2012 refers tothe database of the vehicle life for each battery and the batteryperformance forecast result at the end of the vehicle life (step S122).The battery supply quantity forecast unit 2012 refers to the batteryperformance forecast result of batteries corresponding to the batterytype and supply timing requested by the user regarding all batteriesregistered in the battery database 203, and creates a table uponcounting the number of forecasted supplies of recycled batteries (stepS124).

Finally, the battery supply quantity forecast unit 2012 presents thecreated recycled battery forecast supply quantity to the user (stepS125). FIG. 8 shows an example of the table of the forecasted supplyquantity of recycled batteries. Based on the foregoing processing, theuser can refer to the number of forecasted supplies of the intendedrecycled battery.

As described above, according to this embodiment, it is possible toforecast the quantity level and the performance level of recyclablesecondary batteries that can be supplied and when such a quantity can besupplied. Moreover, since it is also possible to simultaneously forecastthe quantity level of secondary batteries which cannot be reused, it ispossible to forecast the quantity of secondary batteries to be discardedas well.

Embodiment 2

In Embodiment 2, the recycled secondary battery supply forecast systemaccording to the present invention is applied to a device (vehicle) witha recycled battery built therein.

The configuration and operation of the recycled secondary battery supplyforecast system according to Embodiment 2 are the same as Embodiment 1.In Embodiment 2, the performance information of the recycled secondarybattery mounted in the recycled battery built-in device, and the stateinformation of the device are accumulated in the battery managementserver 203. In addition, based on the same procedures as Embodiment 1,the vehicle life/battery performance forecast unit 2011 makes a forecastof the performance of the recycled secondary batter at the end of lifeof the recycled battery built-in device. In addition, the battery supplyquantity forecast unit 2012 counts the forecasted recycled batterysupply count corresponding to the conditions designated by the userbased on the battery performance forecast result of the battery, andprovides the count.

Embodiment 3

In Embodiment 3, the recycled secondary battery supply forecast systemaccording to the present invention is applied to secondary batteriesother than secondary batteries that are mounted on vehicles.Specifically, for instance, considered may be stationary storagebatteries for storing surplus electricity from solar generation or windgeneration.

While the configuration and operation of the recycled secondary batterysupply forecast system according to Embodiment 3 are the same asEmbodiment 1, in Embodiment 3, in order to measure the life of astationary storage battery, the used hours of the battery and electricenergy that was input and output to and from the battery are accumulatedin the battery management server 203 in substitute for the traveldistance parameters used for making a forecast of the vehicle life inEmbodiment 1.

Embodiment 4

In Embodiment 4, the recycled secondary battery supply forecast systemaccording to the present invention is applied to the reuse forecast of amotor that is mounted on an electrically driven vehicle. Motors that areused in electrically driven vehicles are manufactured using rare earthssuch as neodymium. Thus, the reuse and recycling of the motor aredesirable for global environmental protection.

In Embodiment 4, the vehicle life forecast is performed in the samemanner as Embodiment 1. The performance information of the motor ismeasured using output torque, efficiency and other matters, and thereusability is determined based on these values.

This application relates to and Notes priority from Japanese PatentApplication No. 2011-71836, filed on Mar. 29, 2011, the entiredisclosure of which is incorporated herein by reference.

While the present invention was explained above with reference to theembodiments, the present invention is not limited to the foregoingembodiments. The configuration and details of the present invention maybe modified variously as understood by those skilled in the art withinthe scope of the present invention.

Some or all of the foregoing embodiments may also be described as perthe following Notes, but without limitation thereto.

(Note 1) A recycled secondary battery supply forecast system comprisinga vehicle life/battery performance forecast unit which receives, from aplurality of vehicles, performance information of a secondary batterymounted on each of the vehicles and state information of the vehicle fordetermining a life of the vehicle, makes a forecast of an end of life ofthe vehicle by using history of the state information of that vehicle,and makes a forecast of performance of the secondary battery at the endof life of that vehicle by using history of the performance informationof the secondary battery, and

a battery supply quantity forecast unit which makes a forecast of asupply quantity of recyclable secondary batteries at a certain point intime in the future based on a forecast result of the performance of thesecondary battery at the end of life of each vehicle.

(Note 2) The recycled secondary battery supply forecast system accordingto Note 1 above,

wherein the state information of the vehicle indicates a travel distanceof the vehicle, and

the vehicle life/battery performance forecast unit makes a forecast ofthe end of life of the vehicle by calculating a timing of reaching apredetermined travel distance from an increasing trend of the traveldistance of that vehicle.

(Note 3) The recycled secondary battery supply forecast system accordingto Note 1 above,

wherein the state information of the vehicle indicates used hours of thevehicle, and

the vehicle life/battery performance forecast unit makes a forecast ofthe end of life of the vehicle by calculating a timing of reachingpredetermined used hours from an increasing trend of the used hours ofthat vehicle.

(Note 4) The recycled secondary battery supply forecast system accordingto Note 1 above,

wherein the performance information of the secondary battery indicates atotal capacity of the secondary battery, and

the vehicle life/battery performance forecast unit makes a forecast ofthe performance of the secondary battery at the end of life of thevehicle by calculating the total capacity of the secondary battery atthe end of the life of that vehicle from a decreasing trend of the totalcapacity of the secondary battery.

(Note 5) The recycled secondary battery supply forecast system accordingto Note 1 above,

wherein the performance information of the secondary battery indicates amaximum output current of the secondary battery, and

the vehicle life/battery performance forecast unit makes a forecast ofthe performance of the secondary battery at the end of life of thevehicle by calculating the maximum output current of the secondarybattery at the end of the life of that vehicle from a decreasing trendof the maximum output current of the secondary battery.

(Note 6) The recycled secondary battery supply forecast system accordingto any one of Notes 1 to 5 above,

wherein the timing of receiving the state information of the vehicle andthe performance information of the secondary battery from each vehicleis at least one of the following: after lapse of a given period of timeafter previous reception; upon completion of charging of the secondarybattery; and upon termination of use of the vehicle.

(Note 7) A recycled secondary battery supply forecast method, comprisingthe steps of

receiving, from a plurality of vehicles, performance information of asecondary battery mounted on each of the vehicles and state informationof the vehicle for determining a life of the vehicle,

making a forecast of an end of life of the vehicle by using history ofthe state information of that vehicle,

making a forecast of performance of the secondary battery at the end oflife of that vehicle by using history of the performance information ofthe secondary battery, and

making a forecast of a supply quantity of recyclable secondary batteriesat a certain point in time in the future based on a forecast result ofthe performance of the secondary battery at the end of life of eachvehicle.

The present invention is suitable for forecasting the quantity level andthe performance level of recyclable secondary batteries that can besupplied and when such a quantity can be supplied.

-   10 recycled secondary battery supply forecast system-   20 battery management server-   30 communication network-   40 vehicle-   201 recycled battery supply forecast unit-   202 communication unit-   203 battery database-   401 communication unit-   402 battery management unit-   403 secondary battery-   2011 vehicle life/battery performance forecast unit-   2012 battery supply quantity forecast unit

I (we) claim:
 1. A life forecast system comprising: a communication unitwhich receives performance information of a secondary battery mounted ona stationary electrical storage device and state information of thestationary electrical storage device; and a forecast unit which makes aforecast of an end of life of the secondary battery by using history ofthe state information of the secondary battery and the state informationof the stationary electrical storage device.
 2. The life forecast systemaccording to claim 1, wherein the performance information of thesecondary battery indicates a total capacity of the secondary battery,and the forecast unit makes a forecast of the performance of thesecondary battery at the end of life of the stationary electricalstorage device by calculating the total capacity of the secondarybattery at the end of the life of the stationary electrical storagedevice from a decreasing trend of the total capacity of the secondarybattery.
 3. The life forecast system according to claim 1, wherein theperformance information of the secondary battery indicates a maximumoutput current of the secondary battery, and the forecast unit makes aforecast of the performance of the secondary battery at the end of lifeof the stationary electrical storage device by calculating the maximumoutput current of the secondary battery at the end of the life of thestationary electrical storage device from a decreasing trend of themaximum output current of the secondary battery.
 4. The life forecastsystem according to claim 1, wherein the timing of receiving the stateinformation of the stationary electrical storage device and theperformance information of the secondary battery from the stationaryelectrical storage device is at least one of the following: after lapseof a given period of time after previous reception; upon completion ofcharging of the secondary battery; and upon termination of use of thestationary electrical storage device.
 5. A life forecast method,comprising the steps of: receiving performance information of asecondary battery mounted on a stationary electrical storage device andstate information of the stationary electrical storage device; making aforecast of an end of life of secondary battery by using history of thestate information of the secondary battery and the state information ofthe stationary electrical storage device.
 6. The life forecast systemaccording to claim 1, wherein the forecast unit makes a forecast of anend of life of the stationary electrical storage device based on thehistory of the state information of the stationary electrical storagedevice.
 7. The life forecast system according to claim 1, wherein theforecast unit makes a forecast of performance of the secondary batteryat the end of life of the stationary electrical storage device based onthe history of the performance information of the secondary battery. 8.The life forecast system according to claim 1, wherein the life forecastsystem displays a supply quantity of recyclable secondary batteriesbased on a forecast result of the performance of the secondary batteryat the end of the stationary electrical storage device life.